Rttdolph hoffman



Patented Feb. 12, 1929.

` UNITED ls'llnfrrs PATENT oFFICE.

RUDOLPH HOFFMAN, OF CLEVIELNID, OHIO, ASSIGNOR TO V-W VENTILATOR CO., OF

vGOI.UIV[1?US, OHIO, .A CORPORATION OF OHIO.

VENTILATOR.

Application led February 23, 1928. Serial No. 256,388.

lrl'y'present invention relates to improvements in ventilators which are designed lor use in the windows of houses, oi'lices, apartments, hotels and other buildings, and also for use in the windows of railroad cars, street railway carsv and -other vehicles.

rlhe improved ventilator is designed to ventilate a room by providing for required circulation of air, and at the Vsame time to prevent direct drafts through the window opening. When the ventilator is used in windows of railwayv trains, it is also designed to act as a guard against the ingress of cinders, dust, dirt, etc.

The ventilator is preferably constructed ot metal and compactly arranged so that it may with convenience be placed in the window trame below the lower' sash, and it may with equal facility be removed when required.

The ventilator involves the use ol stationary shutters or louvres with which movable lshutters or louvres are adapted to coact in order that the ventilator may be closed against ingress of air, or the louvres may be opened to provide circulation ot'air from the exterior to the interior of the building or vice versa, lfor purposes of ventilation.

The invention consists in certain novel combinations and arrangement oit parts as will hereinafter be more fully set forth and claimed.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention wherein the parts are combined and arranged according to the best mode I have so far devised tor the practical application of the principles ot my invention.

Figure 1 is a view. from the interior of a window showing the ventilator in elevation.

Fig. 2 is a view from the exterior of a window showing the ventilator in elevation.

Fig. 3 isa top'plan View ot the ventilator showing its relation to the side frame members and sill of a window.

Fig. l is an enlarged detail horizontalV sectional view at line 4 4 of Fig. 1.

Fig. 5 is an edge view of one of the iixed louvres.

. Fig. 6 is atop plan view ofthe fixed louvre.

Fig. 7 is a side view at the top of one of the fixed louvres showing the attaching lugs.

Fig. 8 is a sectional detail view at the lower part or bottom ot the ventilator, as at line 8*-8 inFig. fi. V

Fig. 9 is a top view ot one ot the movable louvres.

Fig. 10 is a tace View of a portion of a movable louvre.

In carrying out my invention, I use a pair of box trames l and 2, each of which is provided with an opening 2', and these box frames are longitudinally slidable relative to an intermediate section 3, also constructed oil metal. rlhe ventilator is designed to be in-Y stalled as seen in Fig. 3, between side traine bars F and to rest upon the window sill S. The outer ends or" the box frames are fashioned with notches, as 4, to engage a part of the window frame and hold the ventilator in place as indicated in this figure. The two box frames 1 and 9.- each comprising upper and lower flanges l and 2a respectively, are designed to be pressed toward the center of the intermediate section in order that the ventilator may be shortened for insertion between the opposite side frame bars ot the window frame, and then these box 'trames are autonnitically pressed outwardly into posi tion ot Fig. El. Each ot the box trames and the intermediate section are provided with upper' and lower tubular casings 5, that are alined, and a rod G is fixed to each oll the casings oi the intermediate section. The pair oi tubular casings on each box frame are slipped over the opposite ends of the rods 6, and springs 7 are located between the outer ends ot the tubular casings and the outer ends oi the reds 6 to permit shortening of the ventilator preparatory to placing in position and when these springs expand, they push the ends of the ventilator into position between the side frame bars F, as in Fig. 3.

As best seen in Fig. 2, leach ot' the boxy trames is provided with a guide strap, as at 8 and 9. and these straps are provided with longitudinally extending slots l0. The outer ends of the straps are riveted to their respecf' tive box frames and the inner slotted ends ot these straps overlap so that their slots 10 register and permit th e introduction therethrough of the guide head ll. This head ll has arms or brackets l2 that are VliXed to the central portion of the intermediate section 3, and it will bearpparentl that the slotted: strapsj'are guided this head. rlhe strap 8 has an enlargedretaining head 13, and the strap 9 has a pairofinturned lateral lugs 14.5 that overlap the yedges of the strapv 81` 'It will thus be seen that these retaining lugs and the retaining head guide the movement ot the straps one upon another, and or" course the retaining head and lugspre-vent. separation of thel boxy frames from the intermediate section 31. f 1

Each of the lox i'aines is provided with au.V end slat 15- and an intermediate slat 16 which areisecured asby rivets 17 to the walls of the box frames. These slats extend from the bottom tothe topot the box trame, and they are fashioned to guide air currents throughV the ventilator as indicated by the dotted lines in Fig. 4.

Each oiithefboxiraniesiis provided with an attaching platel 18, one secured to the bottom langeQt-and another secured tothe top flange la. of' the boa; trame. These attached plates areV designed to;y support double lined. louvres shown in Figs. 5, 6 andV 7, aswell as in 4. EachY of these louvres comprises a compound curved centralbend 19 and louvres 20 arranged in parallel'plane, and the bottom and toped-ges of the louvres are provided with attaching lugs 21, which are passed through slots 22 in the plates. 18 and turned under to securethelixedvlouvres in position between the top and botto-m plates 18. vEach of these-ixed louvres has a vertically entending slit 231m the central curved portion which extends trom thetop o"- the louvre and terminates near the bottomthereot. v V

Eachiixed lfou'vre'has a coi'nplementary movable or pivoted louvre also having a central portion fashioned on a. compound curve as at 2li, andthe louvres 25 extend from this bent portion in opposite directions and in parallel planes. 'ilhermovable louvres ar provided with slits 26, and the movable y louvre is slid down into the slot 23 oi its complementary fixed louvre so that the movable louvremay be turned to open positionv as in Fig. f, or' louvres 25 may be swung against complementary stationary louvres or slats to close the ventilatoragainst passageoi air cur rents. 'V y Each box trame 1s providedwlth meansior operating its movable louvres, and such means includes'an operatingr slide 27 which is preferablyrof il! sliape in cross section and fashioned with a slot 28' for engagement vWith-one of the movable louvres, and a cam edge 28 as seeny at Fig; l for irictional engagementyvith anothermovable louvre. 'lliis operatingV .slide moves horizon-tally' and is guided by a pairvot U-shaped brackets 29 secured to the inner face of the box frames near their bottoms, and a lingenpiece 30 is provided :tor each of the operating slides. rl`hus, by grasping the linger-piece 3() the operating slide 2,7 may be moved horizontally to open or close the movable louvres, or the louvres may be partially opened to adjust the ventilating opening.

ln this manner the air currents passing from the ventilator may be regulated, or they may be entirely shut oft without removing the ventilator from the window i ame 'Ehe topand bottom'V portions ot' the ventilatormay be beveled to insure a snug lit betnecnthe window sill and the Window sash and exclude dust, dirt, rain and snow. lho expansion springs aredesigned lo hold the ventilator snugly and :lorm tight joints with the Window frame, and the ventilator is thus retained in its position against aecidental displacement.

Having thus fully describedl my invention, what fit-claim as new and desire to secure by Letters Patent is:

l. The combination in a Window ventilator with an intermediate section and a pair oi box trames, of (3o-acting means on the box frames for guiding their relative movement, springs carried by the box :trames for urging the frames outwardly -from the intermediate section, and Ventilating louvres carried by the box frames..

2. The combination with a sectional, expansible ventilator having overlapping slotted straps and an intermediate iined section, ol' a guide head on the fixed section cri-acting with the slotted straps, tubular casings carried by the box frames, rods carried by said intermediate sectionA and iitted in said tubular cas ings, and springs co-acting with the rods and tubular casings for normally forcing'the bor; frames outwardly.

3. The combination in a window ventilator with a pair of lined, spaced slats, and a pair of lined, spaced longitudinally offset and par allel louvres between said slats, oit a pair ol movable louvros pivoted intern'iediate said louvres and co-acting with the fixed loin-Tres, and means for moving said movable louvrcs.

fi. nPhe combination in a Window ventilator with a tired slat and a fixed louvre disposed at an angle thereto, of a movable louvre supported on the Fixed louvre and means lor adjusting the movable louvre with relation to the end of the fixed slat.

5. The combination with a fixed louvre having a pair of oiiiset flanges extending in parallel planes, of a movable louvre pivotally supported thereon and having'oppositely extending flanges arranged in parallel planes.

6. The combination with lined louvre lfiaving a bend fashioned with a compound curve, of a movable louvre pivoted relatively to the lined louvre and faslfrioned with a com pound curve and said louvres being slotted llU and arranged to form oppositely opening means for adjusting the movable louvre pockets. whereby the area of a pocket at each side of 10 7. The combination Withzilouvre having a `the central portion of the louvres may be central portion formed as a compound curve varied. p

and provided with a slit, of amovable louvre In testimony whereof I have affixed my pivoted relatively to the fixed louvre and signature.

fashioned with a central compound curve and provided With a complementary slit, and v RUDOLPH HOFFMAN. 

